高等学校化学学报 ›› 2018, Vol. 39 ›› Issue (7): 1511.doi: 10.7503/cjcu20170780

• 物理化学 • 上一篇    下一篇

高活性碳球修饰g-C3N4的制备及光催化性能

刘翀(), 刘丽来, 聂佳慧   

  1. 黑龙江科技大学环境与化工学院, 哈尔滨 150027
  • 收稿日期:2017-12-01 出版日期:2018-07-10 发布日期:2018-06-22
  • 作者简介:联系人简介: 刘 翀, 女, 博士, 工程师, 主要从事光电化学与光催化研究. E-mail: 2270720662@qq.com
  • 基金资助:
    国家自然科学基金(批准号: 51604102)资助.

Synthesis of Carbon Ball Modified g-C3N4 for Improved Photocatalytic Activity

LIU Chong*(), LIU Lilai, NIE Jiahui   

  1. College of Environmental and Chemical Engineering,Heilongjiang University of Science and Technology, Harbin 150027, China
  • Received:2017-12-01 Online:2018-07-10 Published:2018-06-22
  • Contact: LIU Chong E-mail:2270720662@qq.com
  • Supported by:
    † Supported by the National Natural Science Foundation of China(No.51604102).

摘要:

以葡萄糖为原料, 采用水热法制备碳球, 并采用湿化学法制备了碳球修饰的g-C3N4. 其光催化降解2,4-二氯苯酚和光催化水产氢性能的测试结果表明, 适量碳球的修饰可提高g-C3N4光催化降解2,4-二氯苯酚和光催化水产氢的活性. 表面光电压谱、 光致发光谱和光电化学测试结果表明, 碳球修饰提高g-C3N4光催化活性的机制在于修饰在g-C3N4表面的碳球具有较好的导电性, 可促进g-C3N4光生电子的转移, 从而改善g-C3N4光生载流子的分离.

关键词: 石墨型氮化碳, 碳球, 修饰, 电荷转移及分离, 光催化

Abstract:

Carbon balls were prepared by hydrothermal method using glucose as the raw material, and the carbon ball modified g-C3N4 samples were synthesized by simple wet chemical method. The results showed that the photocatalytic activities of g-C3N4 were improved after being modified by appropriate amount of carbon balls for both degradating 2,4-dichlorophenol and splitting water. And based on the results of steady-state surface photovoltage spectroscopy, photoluminescence spectroscopy, I-V curve and electrochemical impedance spectrometry, it is revealed that the mechanism of improved photocatalytic activity is that carbon balls promote the photogenerated electron transfer of g-C3N4, thereby improving the separation of the photogenerated carriers.

Key words: g-C3N4, Carbon ball, Modification, Charge transfer and separation, Photocatalysis

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